CN2560125Y

CN2560125Y - Leakage protection socket

Info

Publication number: CN2560125Y
Application number: CN02243497U
Authority: CN
Inventors: 李成力
Original assignee: Shanghai Meihao Electric Inc
Current assignee: Shanghai Meihao Electric Inc
Priority date: 2002-08-07
Filing date: 2002-08-07
Publication date: 2003-07-09
Anticipated expiration: 2012-08-07
Also published as: US7019952B2; US20040027740A1

Abstract

A current leakage protection socket mainly comprises an upper cover, a middle scaffold and a base seat. A metal mounting panel is arranged between the upper cover and the middle scaffold, and a circuit board is arranged between the middle scaffold and the base seat; the upper cover is provided with an output socket, a simulation test button and a reset button; a grounding contact on the metal mounting panel is connected with a grounding pin of a power output socket; the two sides of the middle scaffold are provided with two pairs of socket output metal conductors; the circuit board is provided with a differential transformer; a coil with an iron core, a reset guide component and an elastic unlock switch are arranged inside the circuit board; the two sides of the base seat are symmetrically provided with a pair of power input binding screws and a pair of power output terminals. The utility model is the socket with the function of current leakage protection, which is arranged in an output box of the normal wall,avoiding the damage to the human body and household appliance caused by wrong installation and connection.

Description

A kind of earth leakage protective socket

Technical field

The utility model relates to a kind of socket with creepage protection function, refers to a kind of being installed in the common metope especially, has the socket of creepage protection function.

Background technology

Along with improving constantly of people's living standard, household electrical appliance are universal day by day, and the safe in utilization of household electrical appliance also is subject to people's attention day by day.When the hope that people are urgent was built in the room, the supply socket of reserving in the wall was the supply socket of safety.But the socket of being installed in the wall of present most of rooms is common socket, does not have creepage protection function, has hidden danger during use; Though the socket that has has creepage protection function; but still have a following shortcoming: when installation personnel with the power input line reversal connection; that is to say incorrect interior power input line of metope delivery casing and the output line distinguished of installation personnel; the power input line misconnection is to the earth leakage protective socket output; and with the power supply output line misconnection when the earth leakage protective socket input; the input of earth leakage protective socket; output still can connect by electric power; but at this moment earth leakage protective socket not only can not play earth leakage protective function; and the easiest misleading user continues to use, and causes the damage of personal injury and household electrical appliance.

Summary of the invention

In order to solve the problem that above-mentioned socket exists, the purpose of this utility model provides and a kind ofly is suitable for being installed in the common metope delivery casing, safe in utilization and has the earth leakage protective socket of creepage protection function.During installation, if wiring error, this earth leakage protective socket can stop power input to be connected with output electric power; The power input line reversal connection is during to the socket output, the output of earth leakage protective socket output no-voltage, and have only when the socket wiring is correct, socket just can reset, and the socket output just has voltage output.

To achieve these goals, the utility model adopts following design: a kind of earth leakage protective socket, it is mainly combined by loam cake, middle layer bracket and base, and a metal mounting panel is installed between loam cake and middle layer bracket, and a circuit board is installed between middle layer bracket and base;

Cover on described and be provided with power output socket, analogue test button and reset button;

Described metal mounting panel is provided with grounding contact, and this grounding contact links to each other with the grounding pin of power output socket by the hole of loam cake;

The both sides of described middle layer bracket are placed with a pair of socket output metallic conductor; Two sockets output metallic conductor be provided with metal blade respectively with on live wire, the zero line jack of the power output socket that covers corresponding; Also be respectively equipped with electrical contact on two metallic conductors, this electrical contact is corresponding with the electrical contact that the elasticity power supply on the circuit board is imported on the sheet metal; Horizontal between power supply output metallic conductor and analogue test button have a test film;

Described circuit board is provided with a pair of four elasticity power supplys input sheet metal, and is used to detect the differential differentiating transformer of leakage current, the coil that is built-in with iron core, reset guide assembly and elasticity unlock switch;

Described elasticity power supply input sheet metal is positioned at the both sides of reset guide assembly central perforation and passes differential differentiating transformer and links to each other with power input; Described elasticity power supply input sheet metal is provided with two pairs of electrical contacts, a pair of electrical contact is corresponding with a pair of electrical contact that the socket in the described middle layer bracket is exported on the metallic conductor, and another is corresponding with a pair of electrical contact of the power output end sheet metal that is positioned at described base to electrical contact;

Described base is used to place described circuit board and middle layer bracket; The both sides of base are respectively equipped with a pair of power supply input wires screw and a pair of power supply output connection screw of symmetry; Described power supply input wires screw is imported sheet metal with the elasticity power supply on the circuit board and is linked to each other; Described power supply output connection screw links to each other with power output end sheet metal in the base.

Described reset guide assembly is a cylinder, and it is positioned at described reset button below; Its top is provided with a central perforation; Its underpart is provided with " L " type of movably being made by metal material and locks as parts, and the central authorities of lock buckling part are provided with perforation; In the reset guide component internal, vertically run through central perforation, be provided with a guiding lock; The bottom of guiding lock is the plane, near the bottom the one calm groove that caves in is arranged, and the top of guiding lock is with a spring and embeds reset button inside; Between side of described reset guide assembly and lock buckling part, be provided with a spring.

Described unlock switch is between reset guide assembly and wiring board, and it is made by elastic metallic material, and the one end welds in the circuit board, and the other end dashes the round dot that convex is arranged, and the contact that this round dot and is fixed on the circuit board is corresponding; One end of described unlock switch connects the positive pole of the rectification circuit of a resistance to the circuit board, and the other end is connected to the silicon controlled trigger electrode; Coil on this controllable silicon and the circuit board is in series.

Be provided with a test resistance below described analogue test button, an end of resistance links to each other with the power input zero line.

Because the utility model adopted above design, make earth leakage protective socket in use and when mounted, can protect the safety of the person and household electrical appliance more reliably.

Description of drawings

Fig. 1 is the utility model perspective exploded view

Fig. 2 is the utility model front view

Fig. 3 removes front view behind the loam cake for the utility model

Fig. 4 is placed on circuit board assemblies schematic diagram in the base for the utility model.

Fig. 5 among Fig. 3 along A-A to the cutaway view schematic diagram that promptly stops power input to be connected with output electric power

Fig. 5 B among Fig. 3 along B-B to the cutaway view schematic diagram that promptly stops power input to be connected with output electric power

Fig. 6 among Fig. 3 along A-A to cutaway view be the schematic diagram that power input is connected with output electric power

Fig. 6 B among Fig. 3 along B-B to cutaway view be power input and output electric power catenation principle figure

Fig. 7 among Fig. 3 along A-A to cutaway view be power input and output disconnection catenation principle figure

Fig. 7 B among Fig. 3 along B-B to cutaway view be power input and output disconnection catenation principle figure

Fig. 8 is the physical circuit schematic diagram of the utility model circuit board

Embodiment

As Fig. 1～shown in Figure 4, the utility model is mainly combined by loam cake 2, middle layer bracket 3 and base 4; One metal mounting panel 1 is installed between loam cake 2 and middle layer bracket 3, a circuit board 18 is installed between middle layer bracket 3 and base 4.Wherein:

As shown in Figure 2, loam cake 2 is provided with two power output sockets 5,6; An analogue test button 7 (TEST) and a reset button 8 (RESET).

Between loam cake 2 and middle layer bracket 3, be provided with a metal mounting panel 1;

Grounding contact

11,12 on the mounting panel 1 links to each other with the grounding pin of power output socket 5,6 by the hole of loam cake 2.

As shown in Figure 3, be respectively equipped with a pair of socket output

metallic conductor

13,14 in the both sides of middle layer bracket 3; Be respectively equipped with on the

output conductor

13,14 with loam cake 2 on the corresponding metal blade 60,61,62,63 of power output socket live wire, zero line jack, also be respectively equipped with

electrical contact

15,16 on the

metallic conductor

13,14; Horizontal between the bottom of output conductor 14 and analogue test button 7 in addition have a test film 40.

As shown in Figure 1, base 4 is used to hold middle layer bracket 3 and circuit board 18; Base 4 bilateral symmetry be respectively equipped with a pair of power supply input wires screw 9 (HOT), 10 (WHITE) and a pair of power supply output connection screw 109 (HOT), 110 (WHITE).In base 4, be provided with a pair of power output end (LOAD) 80,81 that links to each other with power supply output connection screw 109,110; On 80,81, be provided with two

electrical contacts

52,53.

As Fig. 4, shown in Figure 5, be installed in circuit boards 18 in the base 4 are provided with a pair of four power supply input

flexibility sheet metals

20,21,50,51, the differential differentiating transformer 19, that can detect leakage current is built-in with iron core 42 coil 26, a reset guide assembly 28 and an elasticity unlock switch 37.

One end of four power supply input

flexibility sheet metals

20,50,21,51 is respectively equipped with

electrical contact

22,55,23,54, and the other end passes differentiating transformer 19 and is connected with power

supply input screw

9,10 by input terminal 24,25.

Electrical contact

22,23 on the power supply input flexibility sheet metal is corresponding with the

electrical contact

15,16 that the socket on the middle layer bracket 3 is exported

metallic conductor

13,14;

Electrical contact

55,54 on the power supply input flexibility sheet metal is corresponding with the

electrical contact

52,53 on the base 4 interior power output ends (LOAD) 80,81.

On wiring board 18, also be provided with the inner coil 26 of placing an iron core 42.Be provided with a test resistance 27 below loam cake 2 analogue test buttons 7, an end of resistance links to each other with power supply input zero line.

With reference to shown in figure 5, Fig. 5 B, the reset guide assembly 28 on the circuit board 18 is positioned at below, input

flexibility sheet metal

20,50,21,51 belows of reset button 8 again, and reset guide assembly 28 tops are provided with a central perforation 29; Reset guide assembly 28 bottoms are provided with " L " type lock buckling part 30 of movably being made by metal material; The central authorities of lock buckling part 30 are provided with a perforation 31; Between side of reset guide assembly 28 and lock buckling part 30, be provided with a circular recess 33, a built-in spring 34.In reset guide assembly 28 inside, vertically run through in the central perforation 29, be provided with a guiding lock 35, the bottom of guiding lock 35 is plane 41, has the pin of a depression decide groove 36 near the bottom, the top of guiding lock 35 is with a spring 91, and embedding reset key 8 inside.

As Fig. 5, shown in Figure 8, between reset guide assembly and wiring board, be provided with the unlock switch 37 that a usefulness elastic metallic material is made, the one end is welded on the wiring board 18, and the other end dashes the round dot 39 that convex is arranged, round dot 39 following corresponding contacts 38.One of unlock switch 37 terminates on the rectification circuit 120, and the other end 38 is connected on the trigger electrode 121 of controllable silicon (SCR), is used for stoping anti-phase wiring, promptly is used for stoping earth leakage protective socket power input, output wiring error.

Fig. 5～Fig. 6 B is that the utility model is realized the principle schematic that earth leakage protective and input, output power connect.

As Fig. 5, Fig. 5 B, Fig. 6, Fig. 6 B, shown in Figure 8, during the utility model operate as normal, press reset button 8, the guiding lock 35 that is attached thereto is moved down, and drive reset guide assembly 28 moves down, the plane 41 of guiding lock 35 just is pressed on the lock buckling part 30, because reset guide assembly 28 moves downward, makes the

contact

39 and 38 conductings of flexible unlock switch 37.Because unlock switch 37 1 terminations one resistance is to rectification circuit anode 120, the other end 38 connects on the SCR trigger electrode 121, the controllable silicon SCR conducting, coil 26 is charged, produce magnetic field, attract iron core 42 bump lock buckling parts 30, make it mobile, the central perforation 31 that the base plane 41 of guiding lock 35 is passed lock buckling part; Simultaneously, because the inertia of

elasticity unlock switch

37,37 pop up, and the two ends 39 of

unlock switch

37 and 38 disconnect, and no current passes through in the coil 26, and magnetic field disappears; Spring 34 between lock buckling part 30 and the reset guide assembly 28 back moves lock buckling part 30; Because the shell fragment 39 of elasticity unlock switch 37 pops up, make the central perforation 31 of lock buckling part 30 be slipped in the lock slots 36 of guiding lock 35, again because the release of the spring 91 on guiding lock 35 tops, reset guide assembly 28 moves up, contact 22,55,23,54 on the input

flexibility sheet metal

20,50,21,51 and output on the

metallic conductor

13,14

contact

15,16 and the

contact

52,53 on the power output end (LOAD) 80,81 link to each other simultaneously, realized power supply input, output power connection.

When Fig. 5, Fig. 5 B, Fig. 8 are the utility model power input and output reversal connection, the principle schematic that earth leakage protective socket stops power input to be connected with output electric power.As shown in Figure 8; if earth leakage protective socket when mounted; mistake a pair of power supply input lead is connected on power output end (LOAD) 109; on 110; even earth leakage protective socket itself is intact; depress the knob 8 that resets; make the two

ends

39 and 38 closures of unlock switch 37; because anti-phase wiring SCR anode and negative electrode; the trigger electrode no-voltage; SCR can not conducting; coil 26 no currents flow through; inner iron core 42 can not clash into lock buckling part 30; the plane 41 of guiding lock 35 is pressed on the silver button parts 30 all the time like this; the unlock switch 37 reset guide assembly 28 of can not upspringing; make input flexibility sheet metal 20; 50; 21; 51 contact 22; 55; 23; 54 with output conductor 13; contact 15 on 14; 16 and power supply output (LOAD) conductor 80; contact 52 on 81; 53 remain off-state, and power input is connected with socket output unregulated power.

Fig. 7, Fig. 7 B, Fig. 8 is when differential differentiating transformer detects leakage current for the utility model utilizes, the controllable silicon SCR conducting, coil 26, produce magnetic field, iron core 42 bump lock buckling parts 30, promoting lock buckling part 30 moves, lock slots 36 on the guiding lock 35 skids off from the medium pore 31 of lock buckling part 30, reset button 8 led the lock 35 top springs 91 effect takeoff, reset guide assembly 28 falls, input

flexibility sheet metal

20,50,21, contact 22 on 51,55,23,54 with socket output conductor 13, contact 15 on 14,16 and power supply output conductor (LOAD) 80, contact 52 on 81,52 separate, thereby have interrupted the power supply input, output power connects.

When the user wants to disconnect the input of earth leakage protective socket power supply; when output power connects; depress analogue test button 7; make test film 40 and test resistance 27 conductings; when differential differentiating transformer detects the simulation leakage current; the controllable silicon SCR conducting; coil 26; produce magnetic field; iron core 42 bump lock buckling parts 30; promoting lock buckling part 30 moves; lock slots 36 on the guiding lock 35 skids off from the medium pore 31 of lock buckling part 30; reset button 8 led the lock 35 top springs effect takeoff; reset guide assembly 28 falls input flexibility sheet metal 20; 50; 21; contact 22 on 51; 55; 23; 54 with output conductor 13; contact 15 on 14; 16 and power supply output (LOAD) conductor 80; contact 52 on 81; 53 separate, thereby have interrupted the power supply input; output power connects.

Claims

1, a kind of earth leakage protective socket is characterized in that: it is mainly combined by loam cake, middle layer bracket and base, and a metal mounting panel is installed between loam cake and middle layer bracket, and a circuit board is installed between middle layer bracket and base;

2, a kind of earth leakage protective socket according to claim 1 is characterized in that: described reset guide assembly is a cylinder, and it is positioned at described reset button below; Its top is provided with a central perforation; Its underpart is provided with " L " type of movably being made by metal material and locks as parts, and the central authorities of lock buckling part are provided with a perforation; In the reset guide component internal, vertically run through central perforation, be provided with a guiding lock; The bottom of guiding lock is the plane, near the bottom the one calm groove that caves in is arranged, and the top of guiding lock is with a spring and embeds reset button inside;

Between side of described reset guide assembly and lock buckling part, be provided with a spring.

3, a kind of earth leakage protective socket according to claim 2, it is characterized in that: described unlock switch is between reset guide assembly and wiring board, it is made by elastic metallic material, the welding of one end in the circuit board, the other end dashes the round dot that convex is arranged, and the contact that this round dot and is fixed on the circuit board is corresponding; One end of described unlock switch connects the positive pole of the rectification circuit of a resistance to the circuit board, and the other end is connected to the silicon controlled trigger electrode; Coil on this controllable silicon and the circuit board is in series.

4, a kind of earth leakage protective socket according to claim 1 is characterized in that: be provided with a test resistance below described analogue test button, an end of resistance links to each other with the power input zero line.